If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Suichang County: The hottest months are usually August and July, with an average temperature of 27°C, while the coldest months are January and December, with an average of 9°C. The rainiest months in Suichang County are June, July, May and August, with each month seeing an average of 237 mm of rainfall.